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  2. Dos Cabezas - Wikipedia

    en.wikipedia.org/wiki/Dos_Cabezas

    Dos Cabezas ([ˈdos kaˈβesas], "two heads") is a painting created by American artist Jean-Michel Basquiat in 1982. The double portrait resulted from Basquiat's first formal meeting with his idol, American pop artist Andy Warhol .

  3. Pies Descalzos - Wikipedia

    en.wikipedia.org/wiki/Pies_Descalzos

    Pies Descalzos (transl. Bare Feet, Spanish: [ˌpjez ð̞esˈkal.sos]) is the third studio album by Colombian singer-songwriter Shakira, released on 6 October 1995, by Sony Music Colombia. Its music incorporates Latin pop styles, additionally experimenting with pop rock elements.

  4. Coefficient of determination - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_determination

    Ordinary least squares regression of Okun's law.Since the regression line does not miss any of the points by very much, the R 2 of the regression is relatively high.. In statistics, the coefficient of determination, denoted R 2 or r 2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable(s).

  5. Linear system - Wikipedia

    en.wikipedia.org/wiki/Linear_system

    In systems theory, a linear system is a mathematical model of a system based on the use of a linear operator.Linear systems typically exhibit features and properties that are much simpler than the nonlinear case.

  6. Linear motor - Wikipedia

    en.wikipedia.org/wiki/Linear_motor

    Free-body diagram of a U-channel synchronous linear motor. The view is perpendicular to the channel axis. The two coils at centre are mechanically connected, and are energized in "quadrature" (meaning a phase difference of 90° (π/2 radians) between the flux of the magnets and the flux of the coils).

  7. Diode modelling - Wikipedia

    en.wikipedia.org/wiki/Diode_modelling

    The Shockley diode equation relates the diode current of a p-n junction diode to the diode voltage .This relationship is the diode I-V characteristic: = (), where is the saturation current or scale current of the diode (the magnitude of the current that flows for negative in excess of a few , typically 10 −12 A).

  8. Trapezoidal rule - Wikipedia

    en.wikipedia.org/wiki/Trapezoidal_rule

    The trapezoidal rule is one of a family of formulas for numerical integration called Newton–Cotes formulas, of which the midpoint rule is similar to the trapezoid rule. ...

  9. Linear grammar - Wikipedia

    en.wikipedia.org/wiki/Linear_grammar

    Linear languages are closed under union.Construction is the same as the construction for the union of context-free languages. Let , be two linear languages, then is constructed by a linear grammar with |, and , playing the role of the linear grammars for ,.